Device for operating sliding doors.



L. T. WEISS.

DEVICE FOR OPERATING SLIDING DOORS.

APPLICATION FILED OCT. I9. I917- Patented July 9, 1918.

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' leased by the operator, and shall be locked" jriicq STATES PA'rENrorrioai.

LOUIsnwEIsTs, or BROOKLYN, NEW YORK, ASSIGNOB, TO RELIANCE BALL BEARINGDOORI-IANGER COMPANY, OF NEW YORK, 1v.- YL, A CORPORATION OF NEW YORK.

. DEVICE FOR OPERATING SLIDING DOORS.

in the borough of Brooklyn of the city of New York, in the State of NewYork, have invented certain new and useful Improvements in Devices forOperating Sliding Doors, of whichthe following is a specification,reference being had to the accompanying drawings, forming a part hereof.

This invention has for its object to provide improved devices for theoperation of sliding" doors, such as elevator doors, wherebythe doorscan be opened easily from one side, shall close automatically when reinclosed position so that they cannot be opened from the other side. Theinvention, which is applicable to a single sliding door, to a multipledoor opening from one side, and to a multiple center opening door, willbe more fully explained hereinafter with reference to the accompanyingdrawings in which it is illustrated in its application, in a practicalform, to a multiple door opening from one side.

In the drawings,

Figure 1 is a view in elevation illustrating the application of theinvention to a door.

Figs. 2 and 3 are detail views,on a larger scale, showing the lockinglatch indicated in Fi 1.

Fig. 4 is a detail View in section of the lower end of the cylindercheck shown in Fig. 1.

Fig. 5 is a detail View showing an embodiment of the invention slightlydifierent from that shown in Fig. 1.

In the embodiment of the invention illustrated in Fig. 1, the wall a hassecured thereto a track on which the sliding door 0 is supported in anyconvenient manner as by a carrier 0.

A bellcrank lever (Z,d, is pivotally mounted on a suitable bracket 03secured to the wall, and is connected at one end with one leaf 0 of thesliding door and at the other end with a plunger by which the closingmovement of the door is effected. The longer arm d of the bellcrank isprovided with a suitable handle as hereinafter described, through whichpressure may be applied by the operators h nd to nnlatch theSpecification of Letters Patent.

Patented July 9, 1918.

Application filed October 19, 1917. Serial NO. 197,383.

door, when it is closed, and to impart to the door its openmg movement.

The other, arm cl of the bellcrank lever is connected to the means bywhich pressure is applied automatically to the door, through thebellcrank lever, to close it when the pressure ofthe operators hand isremoved from the handle. As shown, in Fig. 1, the arm d is pivotallyconnected to the upper end of plunger 6', which has a sliding fit in a'cylinder f. The latter is pivotally mounted, preferably by a ball andsocket 1 joint f, on a bracket f which is secured to the wall or casingof the elevator car or shaft". The cylinder f acts not only as a guidefor the plunger 0 in its movements, but it operates as a check tocushion the downward movement of the plunger, which is heavy enough toeffect the closing of the door when the operators hand is removed fromthe handle. The lower end of the cylinder f is therefore closed by ahead f which is provided with an air vent f, con trolled by a screwvalve f and equipped with a mufiler f". In order that the openingmovement of the door, effected by the operator, may have as littleresistance as possible, the head f is also provided with a check valve 7which permits the air to enter freely during the upward movement of theplunger, but prevents the escape of air during the downward movement ofthe plunger and compels all of the air to pass through the vent f InFig. 5 the long arm d of the operating lever is shown as extended beyondits pivot by a short arm 03 which is connected at its extremity with theplunger 0, by a chain at which passes over the guide wheels cl. Theflexibility of the chain permit the cylinder f to be mounted upon afixed bracket F, instead of being pivotally mounted, as shown in Fig. 1.

Connection between the bellcrank and the door 0 is effected by a link (Zwhich is pivoted to the long arm d of the bellcrank at one end and withthe door at the other end. The long arm d of the bellcrank has alongitudinal slot 0Z which engages a pin 0 carried by the door. Thisslot has a weighted latch 9, provided with a handle g and with a notch gfor coiiperation with the pin 0 is pivoted upon the lever d, as

@at f and has a pin-and-slot connection the door against movement.

therewith, as at 9 to limit the'movement of thelatch. The latchis'overbalanced by V thehandle g so that it stands normally in theposition.shoWn in Fig. 2, ith the pin 0 engaged by the notch 9 therebylocking The pressure of the operators handupon the handle g',' in adirection to open the door, immediately Vdisengages ;the latchfromthe-pin and permits the door to be opened against the Will now heLUIdQIStOOCl Without'fur'ther explanation. It Willalso be understoodthat details of construction and arrangement of the operating devicesmayfbe varied to suit different conditions of use and that'the 1n-Copies of this patent may he obtained for five ee'nts each, byWashington, D. 0.

vention, except as pointed out in the claims,

- is not to be limited constructlon and arrangement shown.

I claim as my invention; 7 V I 1. An operating device for sliding doors,

comprising a lever pivoted; upon fixed point, one arm 0t said leverhaving a lon- I gitudmal slot'm engagement withja pin on" the door topermit the movement ofthe door With the lever and a handle pivoted onthe lever and having a notch for cooperation with the pin onthe door.

2. An operating device for sliding doors coinprlsmg a lever pivoted upon;a fixed point, one arm of said lever ha ving a lo1 1- gitudinal slotniengagement. w th a pin ,on

the door to permit movementof the door with the lever, a handlepivotedon the lever and having anotch for cooperationwith the pm on thedoorand a \ve1gh'te'd plunger connected to the other arm of'said lever.i

This specification signed this 18th day of October, A. 1917.

addressing the Commissioner 013 Patents,

Louis" Ti eiss;

